Modular power adapter with multiple USB ports

Abstract

A modularized power adapter with multiple USB ports comprises a power rectifying circuit, a power voltage regulating circuit and an interface protocol circuit, and the interface protocol circuit comprises a first port module, a second port module and a third port module. The power rectification circuit comprises an input module, a rectification filtering module, a power switch module, a transformer, a synchronous rectification module and an output module. The power switch module can convert smooth direct current transmitted to a primary coil of the transformer by the rectification filtering module into pulse alternating current and then output the pulse alternating current to pass through the transformer, so that a secondary coil of the transformer generates current, the current is rectified by the synchronous rectification module and then output to the output module, and the output module is electrically connected with the power voltage regulation circuit. The power supply voltage regulation circuit can be adjusted according to different voltage requirements of the port modules of the external equipment in the interface protocol circuit, and when one of the port modules is damaged, other port modules can continue to be used.

Description

Technical Field

[0001] This utility model belongs to the technical field of electronic circuits, specifically a modular power adapter with multiple USB ports. Background Technology

[0002] A power adapter is a device that converts electrical energy from one form to another. Its common purpose is to convert alternating current (AC) to direct current (DC) to power various electronic devices. Power adapters are widely used in mobile phones, computers, home appliances, portable devices, network equipment, and more.

[0003] Currently, ordinary power adapters on the market use a circuit board for control. For example, the "Power Adapter with Multiple Charging Methods" disclosed in patent document number "CN105720647A" uses a circuit board to complete the electrical connection and mechanical support between circuit components.

[0004] In the product of this patent, some components of the power adapter are difficult to repair after being damaged, while many components of the damaged power adapter remain intact, resulting in waste when discarded directly. Utility Model Content

[0005] The purpose of this invention is to provide a modular power adapter with multiple USB ports to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A modular power adapter with multiple USB ports is characterized by comprising a power rectifier circuit, a power voltage regulator circuit, and an interface protocol circuit. The power rectifier circuit is used to convert AC power into stable DC power, the power voltage regulator circuit is used to adjust the voltage of the power rectifier circuit, and the interface protocol circuit includes port module one, port module two, and port module three.

[0008] The power rectifier circuit includes an input module, a rectifier and filter module, a power switch module, a transformer, a synchronous rectifier module, and an output module. The input module outputs AC power to the rectifier and filter module, which converts the AC power into smooth DC power. The power switch module converts the smooth DC power into pulsating DC power and passes it through the transformer. The power switch module is used to turn the input module on and off.

[0009] The input module is electrically connected to the rectifier and filter module. The first output terminal of the rectifier and filter module is electrically connected to the power switch module. The second output terminal of the rectifier and filter module is electrically connected to the first terminal of the primary coil of the transformer. The second terminal of the primary coil of the transformer is electrically connected to the power switch module. The secondary coil of the transformer is electrically connected to the synchronous rectifier module and the output module in sequence. The first total output terminal of the output module is electrically connected to the power supply voltage regulation circuit. The second total output terminal of the output module is electrically connected to port module one, port module two, and port module three of the interface protocol circuit, respectively. The power supply voltage regulation circuit is electrically connected to the interface protocol circuit.

[0010] In a further technical solution, an interference suppression module is electrically connected between the input module and the rectifier-filter module, the input module is electrically connected to the interference suppression module, and the interference suppression module is electrically connected to the rectifier-filter module.

[0011] A further technical solution is provided, wherein the interference suppression module includes a common-mode inductor L2, a capacitor CX1, resistors R48, R49, R53, and R54. The input terminal of the common-mode inductor L2 is electrically connected to the input module, and the output terminal of the common-mode inductor L2 is electrically connected to the capacitor CX1. One end of the resistor R54 is electrically connected to one end of the capacitor CX1, and the other end of the resistor R54 is electrically connected to one end of the resistor R48. The other end of the resistor R48 is electrically connected to the other end of the capacitor CX1. One end of the resistor R53, the end of the resistor R54 connected to the capacitor CX1, and the other end of the resistor R53 is electrically connected to the end of the resistor R54 connected to the resistor R48. One end of the resistor R49, the end of the resistor R48 connected to the capacitor CX1, and the other end of the resistor R49 is electrically connected to the end of the resistor R54 connected to the resistor R48.

[0012] In a further technical solution, the rectifier and filter module includes a rectifier unit and a filter unit. The filter unit includes an inductor L1, a capacitor CP1, a capacitor CP2, a capacitor CP3, a capacitor CP4, and a capacitor CP5. The rectifier unit includes a rectifier bridge. The capacitors CP1, CP2, CP3, CP4, and CP5 are connected in parallel. One end of the inductor L1 is electrically connected to the capacitor CP2, and the other end of the inductor L1 is electrically connected to the capacitor CP3.

[0013] A further technical solution includes a MOSFET, a control chip U5, resistors R63, R60, and R55, and capacitors C44 and C48. Pin 1 of the control chip U5 is electrically connected to the first terminal of the secondary winding of the transformer. Pin 2 of the control chip U5 is electrically connected to the source (S) terminal of the MOSFET. Pin 3 of the control chip U5 is electrically connected to one end of resistor R60, and the other end of resistor R60 is electrically connected to the source (S) terminal of the MOSFET. Pin 4 of the control chip U5 is electrically connected to one end of the capacitor C48, and the other end of the capacitor C48 is electrically connected to the source (S) of the MOSFET. Pin 5 of the control chip U5 is electrically connected to the gate (G) of the MOSFET and the drain (D) of the MOSFET. One end of the capacitor C44 is electrically connected to the drain (D) of the MOSFET, and the other end of the capacitor C44 is electrically connected to one end of the resistor R55. The other end of the resistor R55 is electrically connected to the source (S) of the MOSFET.

[0014] In a further technical solution, the control chip U5 is model SW1608.

[0015] In a further technical solution, the power switch module includes a control chip U7, the Drain pin of the control chip U7 is electrically connected to the second terminal of the primary coil of the transformer, and the Drain pin of the control chip U7 is used to convert direct current into pulsating direct current.

[0016] The beneficial effects of this utility model are:

[0017] This utility model provides an input module that outputs AC power to a rectifier and filter module. The rectifier and filter module converts the AC power into DC power, which is then output to a power switch module. The power switch module converts the smooth DC power transmitted from the rectifier and filter module to the primary coil of the transformer into pulsed AC power, which is then output through the transformer. This causes the secondary coil of the transformer to generate current, which is then rectified by a synchronous rectifier module and output to the output module. The output module is electrically connected to a power voltage regulation circuit. The power voltage regulation circuit can adjust the voltage according to the different voltage requirements of the port modules of the interface protocol circuit and the external device. Furthermore, when one port module is damaged, the other port modules can continue to be used, improving the utilization rate of this power adapter.

[0018] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] Figure 1 The process of this utility model Figure 1 .

[0020] Figure 2 The process of this utility model Figure 2 .

[0021] Figure 3 : Circuit diagram of the power rectifier circuit of this utility model.

[0022] Figure 4 : Circuit diagram of the power supply voltage regulation circuit of this utility model.

[0023] Figure 5 The interface protocol circuit of this utility model Figure 1 .

[0024] Figure 6 The interface protocol circuit of this utility model Figure 2 . Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0026] Please refer to Figure 1-6 ;

[0027] A modular power adapter with multiple USB ports includes a power rectifier circuit, a power regulator circuit, and an interface protocol circuit. Specifically, the power rectifier circuit is electrically connected to the power regulator circuit, the power rectifier circuit is electrically connected to the interface protocol circuit, and the power regulator circuit is electrically connected to the interface protocol circuit. The power rectifier circuit converts AC power into stable DC power, the power regulator circuit adjusts the voltage of the power rectifier circuit, and the interface protocol circuit includes several ports. In this embodiment, the interface protocol circuit includes one USB-A port and two USB-C ports, i.e., the interface protocol circuit includes port module one, port module two, and port module three. The power regulator circuit adjusts the voltage of the power rectifier circuit to different voltages according to the different devices connected by the operator. When one port module is damaged, the other port modules can continue to be used, improving the utilization rate of this power adapter.

[0028] In this embodiment, the power rectifier circuit includes an input module, a rectifier-filter module, a power switch module, a transformer, a synchronous rectifier module, and an output module. The input module outputs AC power to the rectifier-filter module, which converts the AC power into smooth DC power. The power switch module converts the smooth DC power into pulsating DC power, which is then passed through the transformer. The power switch module is used to turn the input module on and off. An interference suppression module is electrically connected between the input module and the rectifier-filter module. The input module is electrically connected to the interference suppression module, and the interference suppression module is electrically connected to the rectifier-filter module. The first output terminal of the rectifier-filter module is electrically connected to the power switch module, and the second output terminal of the rectifier-filter module is connected to the transformer. The first terminal of the primary coil is electrically connected, the second terminal of the primary coil of the transformer is electrically connected to the power switch module, and the secondary coil of the transformer is electrically connected to the synchronous rectification module and the output module in sequence. The first total output terminal of the output module is electrically connected to the power regulation circuit, and the second total output terminal of the output module is electrically connected to the port module one, the port module two, and the port module three of the interface protocol circuit, respectively. The power regulation circuit is electrically connected to the interface protocol circuit. It is worth noting that in this embodiment, the power rectification circuit, the power regulation circuit, and the interface protocol circuit are three different circuit boards, so that the three PCBs can be combined to form a complete fast charging power adapter.

[0029] Specifically, the AC power output from the input module passes through an interference suppression module to remove noise before being output to a rectifier and filter module. The rectifier and filter module converts the AC power into DC power, which is then output to the power switch module. The power switch module converts the smooth DC power transmitted from the rectifier and filter module to the primary coil of the transformer into pulsed AC power, which is then output through the transformer. This causes current to be generated in the secondary coil of the transformer, and after rectification by the synchronous rectifier module, the current is output to the output module. The output module is electrically connected to the power voltage regulation circuit, which outputs voltage to the power voltage regulation circuit so that the power voltage module adjusts the voltage according to the information transmitted by the interface protocol circuit, i.e., the voltage requirement of the external device. Different circuit boards in this power adapter are easily replaceable, thus facilitating maintenance.

[0030] In this embodiment, the rectification and filtering module includes a rectification unit and a filtering unit. The filtering unit includes an inductor L1, capacitors CP1, CP2, CP3, CP4, and CP5. The rectification unit includes a rectifier bridge. Capacitors CP1, CP2, CP3, CP4, and CP5 are connected in parallel. One end of inductor L1 is electrically connected to capacitor CP2, and the other end of inductor L1 is electrically connected to capacitor CP3. The interference suppression module includes a common-mode inductor L2, capacitor CX1, resistors R48, R49, R53, and R54. The input terminal of the common-mode inductor L2 is electrically connected to the input module, and the output terminal of the common-mode inductor L2 is electrically connected to capacitor CX1. One end of resistor R54 is electrically connected to one end of capacitor CX1, and the other end of resistor R54 is electrically connected to one end of resistor R48. The other end of resistor R48 is electrically connected to the other end of capacitor CX1. One end of resistor R53, the end of resistor R54 connected to capacitor CX1, and the other end of resistor R54 are electrically connected. The other end is electrically connected to the end where resistors R54 and R48 are connected. One end of resistor R49 and the end where resistor R48 is connected to capacitor CX1 are electrically connected. The other end of resistor R49 is electrically connected to the end where resistors R54 and R48 are connected.

[0031] Specifically, the common-mode inductor L2 can suppress electromagnetic interference, the rectifier bridge can convert AC to DC, and then through capacitors CP1, CP2, CP3, CP4 and CP5, the AC component in the DC is filtered to form smooth DC.

[0032] In this embodiment, the synchronous rectification module includes a MOSFET, a control chip U5, resistors R63, R60, and R55, and capacitors C44 and C48. The control chip U5 is an SW1608. Pin 1 of the control chip U5 is electrically connected to the first terminal of the secondary coil of the transformer. Pin 2 of the control chip U5 is electrically connected to the source (S) terminal of the MOSFET. Pin 3 of the control chip U5 is electrically connected to one end of resistor R60, and the other end of resistor R60 is electrically connected to the source (S) terminal of the MOSFET. Pin 4 of the control chip U5 is electrically connected to one end of capacitor C48, and the other end of capacitor C48 is electrically connected to the source (S) terminal of the MOSFET. Pin 5 of the control chip U5 is electrically connected to the gate (G) terminal of the MOSFET and the drain (D) terminal of the MOSFET. One end of capacitor C44 is electrically connected to the drain (D) terminal of the MOSFET, and the other end of capacitor C44 is electrically connected to one end of resistor R55, and the other end of resistor R55 is electrically connected to the source (S) terminal of the MOSFET.

[0033] In this embodiment, the power switch module includes a control chip U7. The Drain pin of the control chip U7 is electrically connected to the second terminal of the primary coil of the transformer. The Drain pin of the control chip U7 is used to convert DC power into pulsating DC power. The FB pin of the control chip U7 is electrically connected to a resistor R14 and a sensing diode OC1B. The FB pin of the control chip U7 is electrically connected to the resistor R14. The other end of the resistor R14 is electrically connected to one end of the sensing diode OC1B, and the other end of the sensing diode OC1B is grounded.

[0034] In this embodiment, the power switch module includes resistors R56, R52, R59, R64, R61, R26, R27, R66, R67, capacitors C47 and C49, a MOSFET Q4, a voltage regulator, and a light-emitting diode OC1A. Specifically, the first output terminal of the output module forms a first node with resistors R56 and R52, and the other end of resistor R52 is connected to capacitor C47. Electrically connected, the other end of capacitor C47 is electrically connected to the anode of LED OC1A, and the other end of resistor R56 is also electrically connected to the anode of LED OC1A. The cathode of LED OC1A, resistor R59, resistor R64, and the cathode of the voltage regulator form a second node. The other end of resistor R64 is electrically connected to capacitor C49, and the other end of capacitor C49 is electrically connected to the reference terminal of the voltage regulator. The anode of the voltage regulator is grounded. The other end of resistor R59, the second output terminal of the output module, and one end of resistor R61 form a third node. The other end of resistor R61, the reference terminal of the voltage regulator, resistors R66 and R67, and the source (S) terminal of MOSFET Q4 form a fourth node. The drain (D) terminal of MOSFET Q4 is electrically connected to resistor R26, the gate (G) terminal of MOSFET Q4 is electrically connected to resistor R27, the other end of resistor R27 is electrically connected to resistor R26, and the gate (G) terminal of MOSFET Q4 is electrically connected to the interface protocol circuit.

[0035] It is worth noting that in this embodiment, the interface protocol circuit includes an SM3566 chip and an SM3515 chip. The output module is electrically connected to the interface protocol circuit. Specifically, the third output terminal of the output module is electrically connected to the VIN pin of the SM3566 chip, the fourth output terminal of the output module is electrically connected to the VIN pin of the SM3516 chip, and the first terminal of the gate of the MOS transistor Q4 is electrically connected to the 13th pin of the SM3566 chip.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A modular power adapter with multiple USB ports, characterized in that, It includes a power rectifier circuit, a power voltage regulator circuit, and an interface protocol circuit. The power rectifier circuit is used to convert AC power into stable DC power. The power voltage regulator circuit is used to adjust the voltage of the power rectifier circuit. The interface protocol circuit includes port module one, port module two, and port module three. The power rectifier circuit includes an input module, a rectifier and filter module, a power switch module, a transformer, a synchronous rectifier module, and an output module. The input module outputs AC power to the rectifier and filter module, which converts the AC power into smooth DC power. The power switch module converts the smooth DC power into pulsating DC power and passes it through the transformer. The power switch module is used to turn the input module on and off. The input module is electrically connected to the rectifier and filter module. The first output terminal of the rectifier and filter module is electrically connected to the power switch module. The second output terminal of the rectifier and filter module is electrically connected to the first terminal of the primary coil of the transformer. The second terminal of the primary coil of the transformer is electrically connected to the power switch module. The secondary coil of the transformer is electrically connected to the synchronous rectifier module and the output module in sequence. The first total output terminal of the output module is electrically connected to the power supply voltage regulation circuit. The second total output terminal of the output module is electrically connected to port module one, port module two, and port module three of the interface protocol circuit, respectively. The power supply voltage regulation circuit is electrically connected to the interface protocol circuit.

2. A modular power adapter with multiple USB ports according to claim 1, characterized in that, An interference suppression module is electrically connected between the input module and the rectifier-filter module. The input module is electrically connected to the interference suppression module, and the interference suppression module is electrically connected to the rectifier-filter module.

3. A modular power adapter with multiple USB ports according to claim 2, characterized in that, The interference suppression module includes a common-mode inductor L2, a capacitor CX1, resistors R48, R49, R53, and R54. The input terminal of the common-mode inductor L2 is electrically connected to the input module, and the output terminal of the common-mode inductor L2 is electrically connected to the capacitor CX1. One end of the resistor R54 is electrically connected to one end of the capacitor CX1, and the other end of the resistor R54 is electrically connected to one end of the resistor R48. The other end of the resistor R48 is electrically connected to the other end of the capacitor CX1. One end of the resistor R53, the end of the resistor R54 connected to the capacitor CX1, and the other end of the resistor R53 is electrically connected to the end of the resistor R54 connected to the resistor R48. One end of the resistor R49, the end of the resistor R48 connected to the capacitor CX1, and the other end of the resistor R49 is electrically connected to the end of the resistor R54 connected to the resistor R48.

4. A modular power adapter with multiple USB ports according to claim 1, characterized in that, The rectifier and filter module includes a rectifier unit and a filter unit. The filter unit includes an inductor L1, a capacitor CP1, a capacitor CP2, a capacitor CP3, a capacitor CP4, and a capacitor CP5. The rectifier unit includes a rectifier bridge. The capacitors CP1, CP2, CP3, CP4, and CP5 are connected in parallel. One end of the inductor L1 is electrically connected to the capacitor CP2, and the other end of the inductor L1 is electrically connected to the capacitor CP3.

5. A modular power adapter with multiple USB ports according to claim 1, characterized in that, The synchronous rectification module includes a MOSFET, a control chip U5, resistors R63, R60, and R55, and capacitors C44 and C48. Pin 1 of the control chip U5 is electrically connected to the first terminal of the secondary winding of the transformer. Pin 2 of the control chip U5 is electrically connected to the source (S) terminal of the MOSFET. Pin 3 of the control chip U5 is electrically connected to one end of resistor R60, and the other end of resistor R60 is electrically connected to the source (S) terminal of the MOSFET. Pin 4 of the control chip U5 is electrically connected to one end of capacitor C48, and the other end of capacitor C48 is electrically connected to the source (S) terminal of the MOSFET. Pin 5 of the control chip U5 is electrically connected to the gate (G) terminal of the MOSFET and the drain (D) terminal of the MOSFET. One end of capacitor C44 is electrically connected to the drain (D) terminal of the MOSFET, and the other end of capacitor C44 is electrically connected to one end of resistor R55. The other end of resistor R55 is electrically connected to the source (S) terminal of the MOSFET.

6. A modular power adapter with multiple USB ports according to claim 5, characterized in that, The control chip U5 is model number SW1608.

7. A modular power adapter with multiple USB ports according to claim 1, characterized in that, The power switch module includes a control chip U7. The Drain pin of the control chip U7 is electrically connected to the second terminal of the primary coil of the transformer. The Drain pin of the control chip U7 is used to convert direct current into pulsating direct current.

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